Furnace



ug'.` 24 1926. v G. P.' WHITE FURNACE Filed Nov. 27, 1922 3 Sheets-Sheet 2 Immun.

f rv i F* fg E T I 1 Aug. 24, 192e. 1,596,911

G. P. WHITE y Fummc Filed Nov. 27,- 1922 3 sheets-sheet s fl' Ji' kim n Y i Patented Aug. 24, 1926.

UNITED STATES isaaau PATENT OFFl-CE.

GEORGE I. WHITE, OE GLEN ELLYN, ILLINOIS, assit-:Noa ro DE nEIvIEa ELATCIIEORD COMPANY, OE CHICAGO, ILLINOIs, A CORPORATION or ILLINOIS.

EURNACE.

Application filed November 27,192.2. SeralNO. 603,478.

My invention relates to a. furnace for heatingrplates, billets, or other articles of the type providing mechanism for intermittently raising the articles being heated from the floor of the furnace and carrying them forward step by step through the heating chamber.

The principal object of the invention is to provide certain improvements in a furnace of this type whereby the power required for raising the articles and giving them their forward movements is minimized and the operating mechanism employed for this purpose is so constructed and its parts so arranged asv to give structural compactness, thereby saving floor space which is an important consideration from an'economical point of view.

A further object is to provide a furnace of this type, the mechanisms of which are simple in construction, so as to reduce the expense of installation and maintenance.

- The invention is illustrated, ina preferred embodiment, in the accompanying drawings, wherein Fig. 1 is a front elevation of a furnace provided with the conveying mechanism of my invention.

Fig. 2 is a cross sectional view of the furnace taken on line 2 2 of Fig. 3.

Fig. 3 Vis a longitudinal vsectional view on line 3 3 of Fig. 1.

Fig.V 4 is a detail sectional View on line 4 4 of Fig. 3. f.

` Fig. 5 is a sectional plan view taken on line 5 5Yof Fig. 3, and

Fig. 6 is a detail sectional plan on line 6 6 of Fig. 3.

Referring to the drawings, 10 designates the floor of the furnace, which is formed with longitudinal slots or recesses 11 in which operates a part of the mechanism for moving the plates. or other bodies. The numerals 12, 12 indica-te the side walls of the furnace shown as provided with tuyres 13 for fuel in the form of gas or oil, 14 the arch, 15 the front wall and 16 the rear wall. The furnace, itwill be understood, may be of suitable construction, my invention being concerned solely with the mechanism for intermittently moving plates, billets, or other articles, through the furnace. rfhis mechanism is preferably constructed as follows: A carrier 17" is provided consisting. preferably, of al number of. longitudinal pipes 1S extending through the slots 11 in 'the floor of the furnace, connected together shown as -beams, are connected by straps 24 to links 25, the upper ends of which are pivoted to arms 26 of bell cranks 27 fixed to rock shafts 28 that are supported inr bearings 29 carried by I-beams 30 extendin'g` across the top of the furnace from end to end. Each rock shaft, it will be understood, is providedwith two bell cranks.; rfhe upstanding arms 31 of the bell cranks on each side of the furnace are connected by links 32 so that'all of the bell cranks turn in unison to raise both ends of both of the transverse members 21. vOne o-f the rock shafts 28, preferably `the-rock shaft at the front of the furnace is provided with a lever 33 connected by link 34 with the piston rod 35 of a fiuid pressure cylinder and piston device, the cylinder 36 lof which is pivot-ed at 37 to a clevis 38 fixed preferably to the floor on ,A

which the furnace stands although the cyld` inder might be arranged on the top of the furnace. -1 Y 4 The carrier 17 is moved forwardly while in the elevated position and in the opposite direction when lowered into the fioor recesses 11 by mechanism preferably constructed as follows: 39 is a double acting fluid pressure cylinder, the piston of which has a rod 40 pivoted to a lever 41:, the lower end of which has a sliding connection with an anchorage on the iioor and the upper' end a sliding connection with the carrier. The lever consists preferably of two members 42, 42, the lower ends of which are formed with slots 43 to receive/a roller 44 (Fig. 4) turning on a bolt '45 supported by angular members 46 bolted to a recessed portion 4'? of the floor. llhe upper ends ofthe lever members 42 (said members being bolted together at 48. with the interposition of suitable spacers) are formed with longer slots 49 through which extends a roller 50 on a bolt 51 carried by angular members 52 secured to a cross beam 53 which is attached to the pipes 18 in any suitable manner, for example, by U-bolts 54:. The increased length of slots 49 is to malte provision for the raising and lowering of the carrier and its longitudinal movements at both levels.

Operation. To feed the plates, or other articles, into and move them intermittently through the furnace, the carrier 1T is moved in a direction from the rear to the front of the furnace by rocking lever ll to the left (Fig. through. operation of fluid pressure cylinder 39. Pressure is then admitted to cylinder 3G so as to rock the bell cranks 27 from right to left 3), that to say, from the full' line position of that figure to the dotted line position. rlfhis raises the transverse members so as to lift the carrier, obliquely, due to the oblique position of the lover, from the floor recesses l1, the plates or other articles on the floor of the furnace being raised with the carrier. Lever l1 is now rocked backwardly toward the furnace-to the right, Fig. 3- and the carrier is moved on rollers 23 in a direction from the front to the rear of the furnace. The pressure liuid is then eX- hausted from cylinder 36 and the carrier is moved by gravity, obliquely again, into the recesses of the floor depositing the articles on the floor but each at a point a step in advance of its former position. The arrangement of the carrier slidably on the transverse supports 23 and the expedient of suspending the carrier supports from bell cranlrs on the top of the furnace, have the advantages of minimizing the power required to operate the apparatus and also giving structural compactness which is very desirable since factory floor space can thereby be economized, while at the same time the working parts of the apparatus are all accessible for repair, adjustment and lubrication, being in fact all above the floor level (except the anchorage pivot of lever al) instead of being located under the furnace as in some furnaces of this general type. The lift'ng is accomplished by a. single cylinder which is a 1ranged vertically, con. ent with the overhead support of the carrier, thereby minimizing` the overall length of the furnace.

it will be understood that the conveying` device of my invention may be applied to funaces of various types. The invention is not to be considered as limited to the particular species of furnace shown in the drawn rthe details of construction of the mechanism may also be changed in certain respects without deparm the principles of the invention.

i. in combination with a furnace having a recessed floor, mechanism for moving bodies intermittently through the furnace said members,

comprising a carrier, means on the top of the furnace from which said carrier is suspended for raising the carrier through the recesses in the furnace floor, and means for imparting longitudinal movements to the carrier alternately in opposite directions.

2. in combination with a furnace having a recessed floor, mechanism for moving bodies intermittently.through the furnace comprising a carrier, rocking members on the top of the furnace from which said carrier is suspended, means for r clring said members, and means for imparting longitudinal movements to the carrier alternately in opposite directions while the carrier e is in its raised and lowered positions.

3. in combination with a furnace having a reces ed floor, mechanism for moving bodies ite-rmittently through tl ne furnace comprising transverse members at opposite ends of the furnace, a carrier movable on said members, suspending means arranged above said members for supporting and for raising and lowering said members, and means for imparting longitudinal movements to the carrier.

d. In combination with a furnace having a recessed floor, mechanism for moving bodies intermittently through the furnace comprising transverse members at opposite ends of the furnace, vertically arranged guides for theends of said members, a carrier movable on said members, means for raising and lowering said members, and means for imparting longitudinal movements to the carrier. Y

5. ln combination with a furnace having a recessed floor, mechanism for moving bodies intermittently through the furnace comprising transverse members at opposite ends of the furnace, vertically arranged guides for the ends of said members, rollers on said members, a carrier supported on said rollers, means for raising and lowering said members, and means for imparting longitudinal movements to said carrier.

6. In combination with a furnace having a recessedL fioor, mechanism for moving bodies intermittently through the furnace comprising transverse members at opposite ends of the furnace, a carrier movable on said members, roclr shafts on said furnace above said members provided with levers from which said transverse members are suspended, ^leans for rociring said shafts, and means for imparting longitudinal movements to said carrier.

7. In combination with a furnace having a recessed floor, mechanism for moving bodies intermittently through the furnace connkirising transverse members at opposite ends of the furnace, a carrier movableon roel; shafts at the ends of the furnace above said members provided with l vers from which said transverse memllO by links, one of said lshafts being provided' with another lever, a fluid lpressure cylinder, and a link connecting said lever with the piston rod of said cylinder'.

9. ln combination with a furnace having a v recessed floor, mechanism for moving bodies intermittently through the furnace compris.

ing transverse members at opposite ends of the furnace, a carrier movable on said members, rock shafts at the ends of the furnace provided vwith levers from which said transverse members are suspended and with levers connected together by links, one of said shafts being provided with another lever, a fluid pressure cylinder pivoted to the floor adjacent said furnace, and a link connecting said lever with the piston rod of said cylinder. rl

l0. In combination with a furnace having a recessed floor, mechanism for moving bodies intermittently through the furnace ycoinprising transverse members at opposite ends of the furnace, vertically arranged guides for the ends of said members, a carrier movable on said members, rock shafts linked together and provided with levers from which said transverse members aie suspended, means for rotating o-ne of said shafts, and means for imparting longitudinal movements to said carrier.

1l. In combination with afiirnace having a recessed floor, mechanism for moving bodies intermittently through the furnace comprising a carrier consisting of a plurality of 'longitudinally extending pipes and transverse header pipes at the ends of said longitudinal pipes, supporting members at the ends of said furnace provided with rollers on which the longitudinal pipes of the carrier bear, vertical guides for the ends of said supporting members, rocking members on the top of the furnace, links suspending said supporting members from said rocking members, means for moving said rocking members to raise said supports and carrier, and

means for imparting longitudinal move-A ments to the carrier in its upper and lower positions comprising a fluid pressure cylinder, and a lever operated thereby having a slotted connection with said carrier.

l2. ln combination with a furnace having a recessed floor, mechanism for-moving bodies intern'iittently through the furnace comprising a carrier, means for raising and loav-v ering the carrier, means for in'iparting longitudinal movements to the carrier in opposite directions including a fluid pressure cylinder and piston,` and a lever pivoted to the piston, and an anchorage-forone end of the lever with which the lever has a slotted connection, the other end of the lever having a slotted connection with the carrier.

13. ln combination with ya Vfurnace having a lrecessed floor, mechanism for moving bodies intermittently through the furnace comprising a carrier, means' for raising and lowering the carrier, means for imparting longitudinal movements to thecarrier in opposite directions, a roller on said carrier, a slotted lever engaging saidroller, and a fluid pressure cylinder for moving said lev r.

lele. ln combination with a furnace having a recessed floor, mechanism for moving bodies intermittently through the furnace com# prising a carrier, means for raising and lowering the carrier, means for imparting longitudinal movements to the carrier in opposite directions, a roller on said carrier, a lever consisting of two members spaced apart, the upper ends of which are slotted to engage said roller, the lower ends. of said members being also slotted, and a roller arranged in a fixed position which is engaged by the slotted lower ends of said levervmembers.

15. In combination With a furnace having a longitudinally slotted floor, mechanism for moving bodies intermittently through the furnace comprising a carrier consisting of longitudinal pipes which lie in the floor slots and header pipes connecting the ends of the longitudinal pipes, means for raising said carrier, and means for imparting longitudinal movements to the carrier comprising a iluidpressure cylinder and piston, a leverpivoted near its middle to said piston, anchoring means with which one end of the lever has a slidingengagement, and means providing a sliding engagement between the carrier and the other end of said lever.

16. In combination with a furnace having a longitudinally slotted floor, mechanism for moving bodies intermittently through the furnace comprising a carrier consisting of longitudinal pipes which lie in the floor' slots', and header pipes connecting the ends of the longitudinal pipes, transverse sup-` porting members on the ends ofthe furnaceprovided with rollers on which the longitudinal pipes of the carrier bear, rocking members on the top of the furnace from Which said transverse supporting members are suspended, means for moving said rocking meinbers'to raisek said supporting members and carrier, and means for'iinparting longitudinal movements t-o the Carrier comprising a fluid pressure cylinder and piston, a lever pivoted near its middle to said piston, anchoring means with Which one end of the lever has a sliding engagement, and means providing a sliding engagement between the carrier and the other end of said lever.

17. ln combination With a furnace, a carrier comprising longitudinal pipes, header pipes connecting the ends of the longitudinal pipes, and a transverse beam secured to the front ends of said longitudinal pipes, a roller on said beam, a lever, one end of Which is slotted to engage said roller, anchoring means for the other end of said lever, and a pressure fluid cylinder and piston for rocking said lever.

18. In combination with a furnace having a longitudinally slotted floor, mechanism for moving bodies intermittently through the furnace comprising a carrier consisting of longitudinal pipes which lie `in the Hoor slots, header pipes connecting the longitudinal pipes and a transverse beam at the front end of the carrier, transverse supporting members provided with rollers for supporting said carrier, vertical guides for the ends of said supporting members, rock shafts on the top of the furnace at each end, bell cranks on said rockshafts, links connecting said support-ing members t'o said bell cranks, links connecting the bell cranks on each side of the furnace With each other, a lever on one of said rock shafts, a pivoted fluid pressure cylinder provided With a piston, and av link connecting said piston to said last named lever, a. roller on the transverse beam of the carrier, a lever, the upper end of which is slotted to engage said roller, a fluid pressure cylinder arranged under the furnace, having a piston to which said last named lever is pivoted near its center, the lower end of said last named lever being slotted, and an anchoring device engaged by the lovver slotted end of the lever.

GEORGE P. VVHTE. 

